Romulan ship specs

[Ronald Held]

Is there any canonical data on the Romulan ship masses and engine powers, when they are powered by an AGS? I just read a paper trying to design a propulsion source using one,

 

[Saquist]

G2k'sTech Assessment has various ships specs as to volumetrics, mass and crew densities but the Romulans are not part of them. Remember we know little about them because they don't show up often.

 

[Ronald Held]

The reason I asked is that the AGS considered in the paper would be in the 10^9 kg range and (most likely)too small to be fed matter.